Grate



(No Model.)

J. R. FISH.

eATB.

Patented Oct. 11

.e%\ 1 D d.

.WITNESSBS i TTORNBVYS.

nALmwgnpher. wnhingtamrn. C,

per and lower faces.

UNITED STATES PATENT OFFICE.

JOHN R. FISH, OF GRAND RAPIDS, MICHIGAN.

GRATE.

SPECIFICATION forming part of Letters Patent No. 248,155, dated 0ctober.11, 1881.

Application led April 16, 1881. (No model.)

To all whom it may concern:

Be it known that I, JOHN R. FISH, of Grand Rapids, in the county of Kent and State of Michigan, haveinvented a new and Improved Grate, of which the following s a specitica-4 tion.

The object of this invention is to provide an improved rocking grate, especially applicable to locomotive-engines, and designed to prevent ice from collecting onV the under side of the grate when the engine is running through snow.

Figure l is aI sectional side elevationof the grate, `with parts broken away to exhibit other parts on line x sv, Fig. 2. Fig. 2 is asectional elevation on line y y, Fig. l. Fig. 3 repre sents plans ofan arched and a straight gratebar.

Similar letters ot' reference indicate corresponding parts.

In the drawings, A represents an ash-pan having sockets al on its opposite edges, that serve as bearings for 'the journals b b on the ends of the grate-bars B O, respectively.

The grate-bars B are preferably double and provided on their sides willi vertical parallel ribs c, that stitfen said bars B, render them less liable to warp, and by reducing the spaces between the bars when in position make it possible to use line coal on the grate. These bars B are arched from their ends to their centers, as shown.

'lhe grate-bars C are preferably double, and

are provided with vertical parallel ribs c', like those on the bars B, and serving the same purposes. These bars C are'straight on both up- Each bar B O isprovided at one end with a depending leg, D, the extremity of which is provided with ajournal, d, set at right angles thereto, which journals d are all entered into corresponding holes in the shaker-bar E, that extends through the ash-pan A, and is designed to pass up through the foot-board of the engine (not shown) into the cab, to be within easy reach of the operator, whereby the grate may be shaken to free it from clinkers,

crusts, and ashes.

It is designed to place'one straight rocking level of the upper faces of the bars O, and consequently inserted in the lire on the grate, be-

ing thrust up, as it were, above the bottom of the tire that rests on the bars C. Hence the upper faces of the bars B become and continue heated, and the heat of the lire, being conducted down through said bars B, prevents the accumulation of snow and formation of ice thereon to chill the cinders and clinkers on the grate and interfere with the draft through the grate. It is evident, too, that with these npward-projecting bars B alternating with the straight bars O the rocking of the grate will more quickly7 and effectnally break any crusts or cliukers that may form thereon.

The bars B have always curved 'or arched upper faces, but it is not necessary alwa) s that their under faces shouldbe also curved.

I do not claim stationary grate-bars that are arched from ends to centerfnor rocking gratebars straight on their upperfaces, as now in use on locomotive-engines; nor do Ifelam a grate-bar arched or rounded transversely on its upper face, as none of these will accomplish the purposes of this invention but,

Having thus fully described my invention, I claim as new and desire to secure byLetters y Patent- 1. A rocking grate for locomotive-engine furnaces, consisting of the bars BG, having journals b and vertical parallel ribs c c', the bars B arched from their ends to their centers,

'and the bars C straight on both their upper 

